(19)
(11) EP 3 881 065 A1

(12)

(43) Date of publication:
22.09.2021 Bulletin 2021/38

(21) Application number: 19884050.6

(22) Date of filing: 14.11.2019
(51) International Patent Classification (IPC): 
G01N 29/22(2006.01)
G01N 29/34(2006.01)
H04R 19/01(2006.01)
H04R 19/04(2006.01)
H04R 19/08(2006.01)
 G01N 29/24(2006.01)
H04R 15/02(2006.01)
H04R 19/02(2006.01)
H04R 19/06(2006.01)
H04R 19/10(2006.01)
(52) Cooperative Patent Classification (CPC):
B81B 3/001; B81B 2203/0127; B06B 1/0292; B81B 2201/0271
(86) International application number:
PCT/US2019/061403
(87) International publication number:
WO 2020/102492 (22.05.2020 Gazette 2020/21)
(84) Designated Contracting States:
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
Designated Extension States:
BA ME
Designated Validation States:
KH MA MD TN

(30) Priority: 15.11.2018 US 201862768048 P
25.02.2019 US 201962810358 P

(71) Applicant: Butterfly Network, Inc.
Guilford, CT 06437 (US)

(72) Inventors:
  • MIAO, Lingyun
    Fremont, CA 94555 (US)
  • FIFE, Keith, G.
    Palo Alto, CA 94306 (US)
  • LIU, Jianwei
    Fremont, CA 94539 (US)
  • ROTHBERG, Jonathan, M.
    Guilford, CT 06437 (US)

(74) Representative: Hoffmann Eitle 
Patent- und Rechtsanwälte PartmbB Arabellastraße 30
81925 München
81925 München (DE)

   


(54) ANTI-STICTION BOTTOM CAVITY SURFACE FOR MICROMACHINED ULTRASONIC TRANSDUCER DEVICES